My boss wants a water pump installed 200 from his house by a lake. The pump is in the water, the power lines are to be run under a railroad track. Then he wants a heater element to stop the pipe from freezing which both of the circuits are 240 volt. He also then thinks we can tap off of the 240v line to get a 120v circuit for a recepticle by his dock. I am sure that you can not share the 240v line but where does it state this in the NEC if this is not code.